Cmd + shift + v
That is how you switch from the bitmap tools palette to the vector tools palette and reverse in image editing app Pixelmator for the mac.
Pixelmator is a great, value-for-money, alternative to Photoshop. To a great extent, it can almost completely replace Adobe’s cash cow. At least so far, you do not have too many business partners who keep sending you or demanding everything in the .PSD format.